Railroad buffer construction



Dec. 9, 1924- F. RAWIE RAILROAD BUFFER CONSTRUGTION Filed July 2, 1923 2 Sheets-Sheet 1 Dec. 9, igzlii F. RAWIE RAILROAD BUFFER CONSTRUCTION Filed July 2, 1923 2 Sheets-Sheet 2 Fig. 4-.

Patented Dec. 9, 1924.

a barren stares FRANZ RAWIE, OF OSNAIBRUCK-SGI-IINKEL, GERMZANY.

RAILROAD BUFFER CONSTRUCTION.

Application filed July 2, 1923. Serial No. B l9,112.-

To all who-m it may concern:

Be it known that I, FRANZ RAWIE, a c1t1- zen of the German Republic, residing at Osnabruck-Schinkel, Germany, have invented certain new and useful Improvements in Railroad Buffer Constructions (for which I have filed patent application in Germany July 5th, 1922), of which the following is a specification.

This invention refers to such railroad bufii'er constructions in which the buffer is adapted to make a sliding movement in the direction of the rails against the resistance of a packing of sand, pebbles,gravel or the like provided in front of same, and it is intended to provide means for increasing the resiliency and reliability of operation of devices of this kind, and to generally improve the construction and operation of the same.

Whenever it is desired to produce a steady and not dangerous braking action by means of a packing of sand, gravel or the like, it is of paramount importance that such material, sand or the like, should be caused to ress with uniform ressure a ainst a surface of a certain determined area corresponding to thevalue of the desired braking resistance, when the buffer is displaced relatively to the track. It is necessary, therefore, to provide the buffer with a front beam adapted to bear against the packing and to push the same in the forward direction. During this action the buffer, in order to produce a regular reliable braking action, should be free to move relatively to the track without being able to be raised off from the same, inasmuch as the raising off of the buffer is known to be the preamble to the climbing and as a result thereof of the de railment of the cars. In view thereof my invention provides means for mounting the bufier so as to be freely displaceable upon the track the buffer being merely provided with claw shaped guidin means engaging below the head of the rai s, and adapted to prevent the raising off of the buffer from the track. Other details of construction designed to insure the reliability of operation in the practice of my invention, and other advantages will appear from the detailed description of the embodiment of the principles of my invention shown on the accompanying drawings by way of example, Fig. 1 showing a buffing device according to my invention in side elevation and partly in section. Fig. 2 is a plan of the same, Fig. 3

is a section along the line 3-+-3 of Fig. 1, and Figs. -1- and.5 are a vertical section and a plan, respectively, of a modified form of thrust plate structure.

The buffer construction comprises as usually a thrust triangle 1, 2, 8 and athrust sleeper l. It is displaceably mounted upon the rails 5 the heads. of which. are embraced by claws 8 provided on one side of the metal sheets 6, 7 connecting the side bars 1 and 2 of the thrust triangle. lhe claws 8 are arranged on one side of the sheet metal plates 6, 7 only for the reason to allow of being able to connect the ends of the rails by fish plates at least at one side even at the section of rails over which the buffer is going to pass in its movement.

Upon its front side the buffer is provided with a front thrust beam which in the construction shown by way of example in the drawing is made in two sections, and comprises a U-shaped beam 9 and an adjustable thrust plate 10 mounted thereon. The vertical adjustment of the plate 10 relatively to the beam 9 may be effected by providing the web portion of the U-shaped beam 9 at different levels with holes 11 through which bolts Or the like 12 secured in apertures of the plate 10 may be passed. The vertical adjustment of the plate 10 is intended to provide for the adaption of the structure to varying braking resistances which may be desired according to local and other requirements. 13 indicates a packing of sand or the like placed upon the road bed.

When atrain or a car moves against the buffer the thrust will cause the buffer to be displaced towards the packing 13, the material of the packing either giving way latorally or being pushed over the front beam 9, 10 and being spread upon the track, so that to the braking resistance presented by the bulk of the packing 13 there is added the well known resistance presented by a sand packing upon the track. The possibility of freely displacing the buffer relatively to the track results in the particular important advantage that the entire butting structure even after repeated thrust of a moving train or engine against it, and after its displacement is still ready for immediate operation, ina much as there will merely be a change of the particular point at which the braking of the movement of the train takes place in accordance with the displacement of the buffer along the track.

In case of absorbing considerable moments of forces which is only attaintable by displacement through. a large distance it is preferable to provide means that the sand or 6 the like of the packing is wholly or in part pushed sideways. With this point in view the front thrust beam 9 upon its entire extent or for only part of its height may be arranged at an angle to the direction of dis- 10 placement of the buffer. The inclination of the front thrust beam with relation to the ,direction of displacement may also be produced byimparting to said beam a substantiallyangular shape with forwardly directed 1 pointed portion.

In order to make provision for the pos- .sibility that in cold weather the packing which is to constitute the braking resistance becomes frozenso as to exclude the possibility'of regulating and controlling the braking resistance the arrangement may be such "that-the buffer is provided not only with the front thrust beam mentioned the height of which governs the braking resistance of the packing but with a scraper or push beam at anangle to the vertical beam and projecting beyond the upper edge .of the same.. Such modified form of a thrust wall structure is illustrated in Figs. 4 and 5. The front beam 9 9 thrust plate 10 are both angle shaped with a point 14. The scraper at the wup per. edge of the thrust plate is designated 15, andis fixed at its lower edge to flaps 16 and at its upper edge to flaps 17, the flaps 1.6, 17 being formed by working slots into the upper edge of thrust plate 10 and by .asuitably bending the portions between said slots. Experience has shown that the material of this kind of sand packing or the like 40 isonlysuperficiallv frozen to a solid mass even jnthe coldest weather. If therefore the ,;.fro11t thrust beam with its upper edge is belowthe frozen mass of the packing it encounterssubstantially. a rather uniform resistanca. Inorder to arrive at this result, it is., -tl1erefo1 'e, only necessary to provide means yfor suitably. removing the frozen layer of packing remaining above the front thrust beam, which may beeffected by the scraper so or push beam or the like above referred to,

an ,itis possible in this manner to arrive at the desired regular braking even in frosty weather and with a consequently superficially solidlyfrozen packing.

The invention has been described merely in one of its possible exemplifications, but without restricting the invention thereto,

and it should be understood that there may be other modifications and changes to suit existing conditions. and without deviating from the spirit of myv invention as pointed out in the claims.

What I claim is:

1. In a bufiing device the combination with a track and a packing deposited thereon of a buffer proper slidably but undetachably mounted on the rails of the track and provided with a thrust wall bearing against said packing deposited on the track in front thereof. x t v 2.- In a butling device the combination with a track of. a buffer prOperslidably butundetachably mounted on the railsjof the track and provided with a thrust plate in front thereof, thethrust plate comprising an ad justable member allowing heightadjustment of the upper edge of the thrust plate with relation to the track. r

3. In a bufiing device the combination with a track of thrust receivingmeans slidably secured on said trackcomprising a thrust plate in front thereof andscraping or clearing means adapted to displace anupper layer of packing material deposited on the trackinfront of said thrust plate on slidable displacement of said thrust receiving means onthe track. v V

4;. In a bufiing device the combination w th a track, of thrust receivingmeans .slidably but undetachably mounted on said track provided with a substantially vertically arranged thrust plate and with an inclined portion at the upper end thereof extending beyond the upper edgethereof adapted to engage an upper-layer of packing material deposited on the track. A n v 5. In a buffing device the combination with track, forming. rails connected atabutting ends by ish plates atone side only,'of thrust receiving mean slidably but undetachably mounted on said rails, guides on said thrust receiving means engaging said rails on the side opposite the fish plate carrying side, the thrust receiving means provided with a thrust plate in front thereof.

6. In a buffing device'the combination with a track of a buffer proper slidab'ly but undetachably mounted on the rails of said track and provided with a thrust wall arranged obliquely to the direction of said track. V r p i i I,

In testimony whereof, I atiix my signature.

FRANZ RAWIE. 

